Variable-speed power-transmission device.



F. E.-PENDLETON. VARIABLE SPEED POWER TRANSMISSION DEVICE.

APPLICATION FILED JULY 26.1913.

Patented Sept. 17, 1918.

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F. E. PENDLETON.

VARIABLE SPEED POWER TRANSMISSION DEVICE.

I APPLICATION FILED JULY 2511913- I 1,278,994=. Patented Sept. 17,1918.

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WITNESSES l/VI/E/VTOR ATTORNEY F. E. PENDLETON.

VARIABLE SPEED POWER TRANSMISSION DEVICE.

APPLICATION FILED JULY 26.1913.

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' Patented Sept. 17, 1918.

F. E. PENDLETON.

VARJABLE SPEED POWER TRANSMISSION DEVICE.

Patented Sept. 17,1918.

5 SHEETSSHEET 4.

APPLICATION FILED .IULY 26. I913.

A TTOIM/EV F. E. PENDLETON. VARIABLE SPEED POWER TRANSMISSION DEVICE.

APPLICATION FILED JULY 26.1913. I

WITNESSES AYTOR/VEY UNTTED STATES PATENT ()FFICEQ F'RANK E. PENDLETON,OF MONTCLAI'R, NEW JERSEY.

VARIABLE-SPEED rownn-rnarisiirrssloiv DEVICE.

To all whom it may concern:

Be it known that I, FRANK E. PENDLETON, a citizen ofthe United States,and a resident of Montclair, county of Essex, and State of New Jersey,have invented'a new and useful Improved Variable-Speed Power-Transmission Device, of which the following is a specification.

This invention relates to means forsecuring an accurate total movementof a driven element of a mechanical device which shall be proportionalto or a measure of the product of any two correlated quantities,thefirst of which quantities maybe properly represented by the rotationalmovement of a first driving element of the device consisting of a diskor equivalent means, and the second of whiclrquantities may be properlyrepresented by the position of a second driving element of the deviceconsisting of a wheel or disk, the periphery of which is held in contactwith the first driving element mentioned, the axis of which wheel isparallel to the surface of such first drivingelement and intersects theaxis thereof, and the movement of which wheel or disk laterally alongits axis from an initial or Zero posi tion properly represents or is ameasure of the second quantity referred to. Thus,'if one of the twodriving elements is moved from an initial position of rest proportionalto distance while the other driving element-moves from an initialposition of rest proportional to pressure, then the third or drivenelement will exhibit an accurate record or total movement proportionalto the product of distance and pressure in terms of footpounds or otherunits, as may be provided for. Again, bearing in mind that velocity isequal to distance moved, divided by time required to move such distance,then if one driving element moves from an initial position of restproportional to time, while the other driving element moves from aninitial position of rest proportional to velocity, then the third ordriven element will exhibit an accurate record or total movementproportional to the product of time and velocity which is distance, andmay be expressed in feet or other units as be provided for.

The invention also relates to means where by a paper chart or othermarking surface shall move at a rate proportional to the movement of thefirst driving element of the device and in such a direction that apencil or stylus moving with the second specification of LettersPatent,p t nt ds t 17, 3 Application and my 26, 1913.

Serial No. 781,347.

driving e'lement of the device shall trace a line or record which willexhibit the relation at all times of thetwo driving elements and l ofthe quantities whichtheyrepresent. The invention further relates tomeans whereby a needle or pointer shall indicate the momentarychang'esin position of the wheel and the momentary changes in the value of thequantity which the location of that element from its initial positionrepresents, and to means for multiplyingormagnifying such changes of theposition of such element in order to obtain increased accuracy ofobservation. Also to means for supporting the various parts and'elementsreferred to, and also integral therewith, means for supporting andattaching the device in a suitable position with reference to securingmovement in one of the driving elements from an exterior source,themovement of which is proportional to any pressure, velocity of flow,etc. It also relates to mean for incasing all of the movable elementsdescribed in such manner that access to such parts may only be securedby breaking a seal or other locking device; to means for introducing arotating shaft or other device through the casing; to means forsupporting a movable or swinging bifurcated arm at one end by a hollowshaft passing therethrough and rigidly connected to the supporting framein such fashion that the axis of the supporting hollow shaft shallcoincide with the axis of the driving shaft introduced through the wallof the casing; to means for quickly changing the level and alinenient ofthe register frame and the hollow shaft supported thereby until the axisof the hollow shaft shall coincide with the axis of the driving shaftintroduced through the wall of the casing; to means for connectingrigidly the driving shaft referred to with the swinging arm after thetwo axes are brought into aline ment; tomeansfor connecting one branchor free end of the bifurcated arm with the contact wheel'before referredto in such fashion that movement of the arm through a small are aroundits supporting shaft shall cause the contact wheel to move along its ownaxis, across the face of the disk or cone, as hereinafter described; tomeans for supporting at the free end of the other branch a pencil orstylus, the initial position of which on the chart referred to shallcoincide with the initial position of the contact wheel; to means foradjusting the position of the swinging arm with relation to the drivingshaft so that the initial position of the contact wheel and stylus shallcoincide with the initial position of the shaft introduced through thecasing, together with means for securing such adjustment fromdisarrangement; to means for limiting the arc through which the swingingarm may move so that the contact wheel connected thereto shall not beallowed to approach the center or apex of disk or cone nearer than theinitial position referred to, and means for securing such adjustmentfrom disarrangement.

It further relates to means for preventing rapid or vibratory rotationalmovement of the driving shaft from being transmitted to the swinging armand thereby imparting a rapid or swinging movement to the contact wheelalong its axis which would interfere with a proper frictional contact ofthe wheel with the surface of the disk or cone, but such as will causethe swinging arm and contact wheel connected thereto to occupy a meanposition with reference to the vibratory movement of the driving shaft,and in the absence of such vibratory motion of the shaft will cause theswinging arm and wheel connected thereto to move in proper relation torotational movement of the driving shaft.

Furthermore, the invention relates to means for supporting a counter ordial rigidly to the frame of the register and in a position at thecenter of a circular chart;

to. means for inclosing such counter or dial by a casing or box to whichthe circular and annular chart shall be attached and supported in suchfashion that while the dial remains fixed in position, the casing or boxtogether with the chart affixed thereto may rotate around an axiscoincident with the axis of the center of the dial and its support; tomeans for securing the chart to the rotating casing or box in suchfashion that the chart may be quickly and easily removed and replacedwithout the use of screws or other small parts; to means for drivingsuch chart together with itssupport around its axis at a rate ofrotation proportional to the rate of rotation of the disk or cone; tomeans for supporting the wheel in contact with the disk orcone and soconnecting-the wheel with one member of the differential by the use of acrown gear that a swinging movement of the bridge supporting the contactwheel will not interfere with a proper meshing of the gear teeth; tomeans for preventing a negative movement of that member of thedifferential which is connected to the counter or dial; or preventing anegative movement in any other gear actuated by this member of thedifferential by the use of a ratchet pawl; and finally to a specificdesign and arrangement of the relative location of the dial or counterand the recording chart together with the casing which in closes thedevice such that the dial shall be at the center of the chart and casingor shall project through an annular orifice or opening in the center ofthe'paper chart.

In the drawings, wherein similar characters'of reference denote similarparts-in the several views Figure 1 is a plan view illustrating theimproved differential mechanism of my invention.

Fig. 1 is a section on a line extending between the'parts 369 and 370 inFig. 1.

Fig. 2 illustrates the invention embodied in an integrator, showing thesame in face view with parts broken.

Fig. 8 is a longitudinal sectional view through the form of device shownin Fig. 2.

Fig. 4c is a vertical section on the line H of Fig. 5.

Fig. 5 is a horizontal section on the line 55 of Fig. 4.

Fig. 6 is a vertical section on the line 66 of Fig. 4L.

Fig. 7 is a vertical section on the line 7-7 of Fig. 3.

Fig. 8 isa side view of the register arm with the scribe attachedthereto.

Fig. 9 isa front view of a part of the register arm intended to showmore clearly the rack thereon.

Referring to the invention in a generic way, as illustrated in Fig. 1,the part marked A is the first driving element of the device, the partmarked B is the second driving element and the part marked 83 is thethird or driven element. JD is a clock or. other form of motor by whichthe first driving element is rotated at constant or variable speed andwhich also rotates shaft 366 and the first gear member shown as a spurgear 374% affixed thereto at a rate of speed proportional to the rate ofrotation of the member A. The shaft 6 upon which is slidably mounted thesecond driving element B is formed with a feather along its lengthcorresponding to a key way out on the inner surface of the element B sothat a rotational movement of e B will cause shaft 6 to rotatetherewith. The shaft 366 supports several gears loosely mounted thereonwhich in connection with. the first gear member 374: forms adifferential. In the improved arrangement illustrated the gear member374, as described, is aflixed to the shaft 366, while the second gearmember 371, carrying the pinions 372 and 373 meshing with the member37a, is connected by gears with the contact wheel B. The gear connectionin this particular instance consists of a crown gear 3'71 mounted on theshaft 6 and an idler pinion 371 meshing with the member 371. Theinternal gear member 37 O which is also in mesh with the pinions 372 and373 is carried by the gear 369, the latter gear meshing with the pinion82 mounted on the driven element, to wit, the shaft 83. By properselection of sizes of gear members, 371, 372, 373 and 374, the positiverotation of member 371 when B is at zero position will be so related tothe positive rotational movement of the member 374 that the internalgear member 370 together with the pinion 82 and shaft 83 shall remainstationary.

It will be noted that by moving the element B away from the zero circleand the center of A, the rotational speed of the second gear member 371is increased proportionately to the distance that B is moved from theZero circle and the movement of the third or driven element 83 isproportional to the distance of B from its initial position.

It is to be noted that in this arrangement all of the members of thedifferential are moving positively and the movement of shaft 366together with the gear 374: is always at a greater rotational speed thanthe members 371 and 370 supported loosely thereon, and such greaterrotational speed of shaft 366 tends to rotate members 371 and 370 at agreater speed than they are allowed to rotate by the frictional contactof the element B with the element A. The result is to produce a forwarddrag effort or pull upon the members 371 and 370 in the same directionthat they are being driven by the frictional contact of elements B andA, in such manner that the frictional resistance of the moving parts isbalanced, and the frictional contact between the rapidly moving shaft366 and the relatively slower ro tating members 371 and 370 may besufficient to produce a positive efiort of member B at the point ofcontact of element A, in such mannerthat theelement A may even become adrag or brake upon the rotational move ment of element B.

The driven element in the particular exemplifications hereinbeforedescribed is the shaft 83, which in practice is connected to anappropriate means or mechanism which is to be driven therefrom.

I designate herein as an exhibitor or, an exhibiting mechanism either ofthe different kinds of mechanisms which are commonly referred to in thisart as recorders or register or indicators or integrating devices.

In thepaticular exemplification of the invention shown in Figs' 2 to 9,inclusive, the invention is shown as embodied in an automatic integratorhaving a counting mechanism K, which is driven by the shaft 83. Thisparticular embodiment of the invention will be described in detail andattention is here called to the fact that it includes the first drivingelement A, the second driving element B and the form of differentialmechbined with each other and with other elements in such manner as toproduce an automatic integrator,

The part marked L is a shaft the rotative movements of which are to berecorded and integrated. This shaft extends through a hollow sleeve 21fixedly secured by the screw threads22, to a frame member 23, having arearwardly extending part 24:, forming a bracket by which the frame ofthe device is suitably secured to an appropriate support M, by a capbolt 25 and adjusting nuts 26, 26. This manner of supporting the frameallows'it to beadjusted and properly leveled by adjusting the screws 26,26,'so that the axis of the sleeve 21 shall coincide with the axis of thshaft L, the device being secured in its adjusted position by the capbolt 25. 21* is a cover which fits over the bolt and screws which cannotbe turned until said cover is removed. Pivotally mounted on the sleeve21 is a register arm N, having two members 27 and 28, the member 27 ofwhich projects rearwardly and has its upper end suitably arrangedbetween flanges 29, 29, projecting from the hub 29*, ofthe disk or wheelB. The end of the member 27 is preferably provided with a roll 27 for engaging the flanged part of the hub of the wheel B, which as alreadystated, is slidably mounted on a shaft 7;, to which it is secured insuch way as to impart rotative movement thereto from the rotating diskA. In the herein exemplified form of the invention the shaft 6 ishexagonal in cross section and the axial opening of the wheel B is ofcorresponding shape, whereby rotative movement of the wheel is impartedto the shaft and yet the wheel is free to be moved longitudinally of theshaft.

The other member 28 of the register arm N is provided with a point orscribe 33, which makes a graphic record upon a chart 0, as hereinaftermore clearly explained. The register arm l derives motion from the shaftL, being secured to the end of said shaft, preferably by means of an arm34, one end of which is secured to the shaft L, by suitable means, asscrews 35, for example. The other end of the arm 31 is secured in amanner which permits adjustment of the arm N, preferably by a bolt 36extending through a lug 3'7, projecting from the arm N into an openin 38formed in the arm 34.

The bolt 36 passes loosely through the arm 31 and is screwthreadedthrough the lug 37. vEach end of the bolt passes loosely through thefree end of a spring 36 connected to each side of the arm 3%. By properadjustment of the bolt 36 and lock nuts threaded thereto, a tension maybe brought upon the springs 36 such that for a given position of the arm31, the arm N will occupy a middle position and so held by the equaltension of the two springs 36. With an oscillatory motion of the arm 34the resistance of the wheel B in 7 contact with the disk A will causethe arm cillations of the arm 34. The amount of clearance allowedbetween the springs 36 and the arm 34 will be governed by the ad-.justment of the bolt 36 and the position of the lock nuts thereon. Theset screw 37 lo'cks'the bolt 36 in its set position. Where there is novibratory motion of the shaft L and arm 34 the use of springs isunnecessary and the lock nuts are adjusted to hold the springs 36against the arm 34. A stop post 28 is secured to the frame 23 andextending through thearm N is a stop screw 28' which takes up againstthe stop post 28 and limits the movement of arm N and prevents the wheelB connected thereto from moving within the zero circle. 28 is a setscrew carried by the arm N to hold the screw 28*" in its adjustedposition.

The register arm, in addition to sliding the wheel B on theshaft b, andalso in addition to moving the pointer or scribe which makes a graphicrecord on the chart 0, further moves an indicating pointer 39 over anindicator P. For the latter purpose it is provided with an arcuate rack40, which meshes with a pinion 41 to which is rigidlysecured an arm 42fixedly connected with the pointer 39, being preferably integral withthe latter. The indicator scale is preferably made on a sheet of paper43, properly marked and fastened to a scale plate, 43*, and is protectedby a transparent cover, such for example as a thin sheet of glass. Thiscover is held in position preferably by a frame 44 suitably connected tothe scale plate 43 The rack 40 and pinion 41 are preferably socorrelated that the angular movement of the pointer 39 is more thantwice that of the register arm. The indicating mechanism just describedshows the momentary position of the rock shaft L.

The graphic record which is made on the chart 0 will show the movementsof the rock shaft L within a predetermined period of time, preferablyone week. The chart is divided into spaces d, representing maindivisions of'the time required for it to make a complete revolution, andeach of these divisions is subdivided into spaces (Z, representingdivisions thereof. Each main division (Z preferably represents one dayand each subdivision d" preferably represents one hour of the day. Thisis accomplished by dividing the chart into seven equal main divisionscl, and dividing each main division into twenty-four equal subdivisionsd.

The means for rotating the graphic record comprises the clock mechanismD, hereinbefore referred to, which in this particular exemplification,drives a gear mounted on the rear end of a shaft 46 which extends towardthe frontof the device and has its forward the disk A, thereby causingsaid wheel to roend provided with a pinion 47 which meshes with anidlergear 48, which in turnmeshes with a gear 49 to which a dial-box-50 issecured. The dial box is provided with a ring 51 to secure the chart 0to the dial box. The chart rotates against a plate 52 which is suitablysecured to the frame preferably by flush-head bolts secured by nuts tothe frame 23. The chart is thus rotated continuously and at a constantrate, and as the scribe 33 is moved pivotally and synchronously with therocking movements of the shaft L, it will be apparent that the movements of said shaft will be graphically recorded on the chart, thedivisions and subdivisions of the latter showing the times of themovements recorded.

The clock mechanism is secured to a back plate 53, and in front of thisplate the disk A, hereinabove referred to, is mounted on a shaft 54,having a pinion 55 which meshes with a gear 56 of the clock mechanism,.whereby the disk A is rotated. The correlation of the parts preferably.is'such that the disk makes a complete revolution once each hour. Theface of the diskA is preferably covered by a sheet of rubber or othersuitable material 57, for contact with the wheel B. This sheet 57 issuitably fastened to the disk as by being glued thereon, and is held atthe center by a washer 58 and at the outer edge by a ring 59.

It will be apparent that movements of the rock shaft L transmitted tothe arm N, through the arm 34 will not only cause the making of thegraphic record on the chart as already described, but further will causethe rocking movement of the arm N to slide the wheel B on the shaft Z)across the face of tate at a rate which accords withthe position of therock shaft, it being apparent that the wheel'B will rotate faster whenit engages the disk near the periphery of the latterthan when it engagesthe disk near the axis thereof. This movement of the wheel B inaccordance with the rocking movement of the shaft L operates through adifferential mechanism, a registering or counting means K hereinafterreferred to which is mounted in the dial box 50, preferably providedwith a transparent cover 60. The train of gearing for operating theregistering or counting mechanism K includes the gear 61 rotativelyconnected to the shaft 54 deriving its motion from the clock mechanismas described. The gear 61 meshes with a coacting gear 62 mounted on theshaft 366 upon which is affixed the first gear member 374 and upon whichis also journaled the loose differential members'371 and 369 asdescribed in connection with Fig. 1. As best understood by reference toFig. 5, the train of gearing for trans mitting the differential motionbetween the first driving member A and thesecond driving member B to theregistering mechanism is that shown and described in connection withFig. 1 which operates in the improved manner described wherein thefriction drive between the member A and the member B becomes not a drivebut a brake upon the moving parts of the differential by reason of thedriving effort of the gear 874 as heretofore described. Thisdifferential motion is transmitted from the driven gear 37 0' throughthe dial gear 82 mounted on the shaft 83 extending through the plate 67to transmit its motion to the gears within the counting or registeringmechanism M.

In operation the disk A may desirably be rotated by the clock once ineach hour. The disk gear 61 rotates therefore, once each hour and causesa similar rotation of the first gear member 874 of the differential. Acorrelated rotation of the second gear memher 371 in the same directionis effected by motion transmitted from the wheel driving element B, thespeed thereof being determined by the position of the driving element Bon the shaft 6. In the manner described, the relative motion of the gearmembers 371 and 374 will rotate the planet gears 372 and 37 3 to controlthe movement of the driven gear 369 to operate the exhibitor K.

The indicator needle moves approximately through twice the angle thatthe register arm passes through. If the clock is fast, it will be shownby the chart not agreeing with standard time; likewise, if the clock isslow, The chart will show and record for the week while the indicatorshows the momentary position of the rock shaft.

The shaft 6 which carries the wheel B and the crown gear is carried by abridge 85, which bridge is pivotally supported by bridge pivots 86, sothat it is free to swing and is provided with a weight 87 projectingfrom an arm 88 to hold the wheel B against the face of the disk A.

The parts of the device are incased. The casing includes a cover 90,which fits over the flange of the frame and is provided with a ring ordoor 91, having a transparent protecting plate 92, preferably made ofglass. The cover is secured to the frame by means of screws at 93, 93,entering through the frame from the rear and in such manner that thescrews cannot be taken out and the cover removed until the hood 94 isremoved. The hood 94 is preferably made of thin sheet metal fittingwithin the flange of the frame and secured in position by two butterflynuts 95, turned up to proper position over sealing post 96. When theregister is closed, the nuts 95 are connected together by wire 97, theends of which are sealed together. The hood cannot be removed withoutbreaking the seals and the cover 24 cannot be removed from the bolt 25and screws 26 without removing the hood. The ring or door 91 ispreferably hingedly con nected to the cover 90, in order to give accessto the interior of the case. Rubber gaskets 98 and 99 are providedbetween the frame and cover on the one side and between the frame andhood on the other side to prevent the entry of dust or moisture.

It is to be understood that the illustrated embodiments of the inventionare merely intended to exemplify the different suitable arrangements andcorrelation of parts, and that the invention may be otherwise embodiedwithout departing from the spirit of the invention.

Having now described my invention, what I claim as new and desire tosecure by Letters Patent is:

1. The combination with a power member and an exhibitor of connectionsbetween the power'member and exhibitor having a friction drive,comprising two members, one member of the friction drive being slidablymounted with relation to the other member thereof, an oscillatory armconnected to the slidable member of the friction drive, a pointer, andconnections between the pointer and arm, said connections comprising arack carried by the arm, and a pinion engaging said rack and connectedto the pointer.

2. The combination with a power member and an exhibitor of connectionsbetween the power member and exhibitor, said connections including afriction drive, one member of which is slidable with relation to theother member thereof, a rock shaft, an oscillatory arm connected to theslidable member of the friction drive, and means for oscillating saidarm from the rock shaft, said means comprising an arm which is rigidlyconnected to the shaft at one end and has its other end adjustablyconnected to the first mentioned arm.

3. The combination with a power member and an exhibitor of connectionsbetween the power member and exhibitor, including a friction drive, onemember of which is slidable with relation to the other member thereof, arock shaft, means for sliding the slidable member of the friction drivefrom the rock shaft, said means comprising an arm pivotally mounted withrelation to the rock shaft, a stop carried by said arm, and connectionsbetween the pivoted arm and the shaft, said connections comprising asecond arm fixedly connected to the rock shaft and provided withadjustable elements cooperating with the stop on the first mentioned armand with springs operatively related to said adjustable element.

4. The combination with a power member, an exhibitor, connectionsbetween the power member and exhibitor, said connections having afriction drive including two members, one of which is slidably relatedto the other,

of a rock shaft, an oscillatory arm mounted for pivotal adjustment withrelation to the rock shaft, and connections between the rock shaft andarm, whereby the latter is oscillated from the shaft, said arm havingconnection with the slidable member of the friction drive for varyingits speed of rotation in accordance with predetermined movements of therock shaft.

5. The combination with a power member, an exhibitor, connectionsbetween the power member and exhibitor, said connections having afriction drive including two members, one of which is slidably relatedtothe other,

of a rock shaft, an oscillatory arm having a sleeve or hollow shaftthrough which the rock shaftloosely extends, means connecting the rockshaft to said arm whereby the latter is oscillated from the shaft, andadj ustable supporting means for said arm, said arm having connectionwith the slidable member of the friction drive for varying its speed ofrotation in accordance with predetermined movements of the rock shaft.

6. The combination with a power member, an exhibitor, connectionsbetween the power member and exhibitor comprising a first drivingelement secured to the power member, a second driving elementfrictionally engaged with the first driving element and slidable alongthe face of the latter, a differential having one member connected withthe second driving member, another member connected with the powermember and a third member connected with the exhibitor, of a rock shaft,an arm adjustably mounted with relation to the rock shaft, connectionsbetween the arm and the rock shaft whereby the arm is driven from saidshaft, and connections between the arm and the second driving elementwhereby the latter is adjustable with relation to the first drivingelement.

7. The combination with a power member, an exhibitor and connectionsbetween the power member and exhibitor, said connections including afriction drive having two members, one of which is adjustable along theface of the other, of a rock shaft, an oscillatory arm, connectionsbetween the rock shaft and the oscillatory arm, whereby the latterderives movement from the former, connections between the arm and theslidable member, of the friction drive for adjusting the latter,a hollowshaft or sleeve connected to said arm and through which the rock shaftextends loosely, and an adjustable support for said hollow shaft orsleeve and arm.

8. The combination with a power member of an impression receivingsurface operatively connected thereto, an exhibiting element andconnections between the power member and exhibiting element, saidconnections including a differential gear and erating connections fromthe a friction drive having two members, one of which is adjustablealong the face of the other of a shaft upon which said adjustablefriction gear is mounted and with which it turns axially, an impressiondevice and means for simultaneously moving said adjustable frictionmember longitudinally along said shaft, and said impression device alongsaid impression receiving surface.

9. The combination with a power member, an impression-receiving surface,connections whereby the latter is rotated from the power member, anexhibiting element, connections between said exhibiting element andpower member, said connections including a differential gear, a frictiondrive having two members, one of which is adjustable over the surface ofthe other to vary the speed of its rotation, of a rock shaft, an armhaving two members one of which is connected to the adjustable member ofthe friction drive for adjusting the latter, and the other of whichcarries an impression element operatively related to saidimpression-receiving surface, and means connecting the arm with the rockshaft.

10. The combination with a power member and an exhibitor, of connectionsbetween the power member and exhibitor comprising a first drivingelement, a second driving element frictionally engaged with the firstdriving element, a differential means comprising gear members connectedto the respective driving elements to be rotated thereby in the samedirection and planet gearing between the gear members to be rotatedproportionate to the relative movement of the gear members andconnections from the planet gearing to the exhibitor.

11. Thecombination with a powermem ber and an exhibitor, of connectionsbetween the power member and exhibitor comprising a driving element, asecond driving element frictionally engaged with the firstdrivingelement and shiftable radially with relation thereto and adifierential means comprising a gear member connected to be driven bythe first driving element'and a second gear member connected to bedriven by the second driving element at the same or greater speed thanthe first gear member and in the same direction of rotation, and aplanet gear or gears journaled in the second gear member and engagingsaid first gear member, to be rotated proportionate to the relativemovement of the gear members and 0pplanet gearing to the exhibitor.

12. The combination with. a power member and an exhibitor, ofconnections between the power member and exhibitor comprising a firstdriving element, a second driving element frictionally engaged with thefirst driving element, a differential means comprising a gear memberconnected to be driven by the first driving element and a second gearmember connected to be driven by the second driving element at the sameor greater speed than the first gear mem her and in the same direction,and planet gearing arranged to be rotated proportionate to the relativemovement of the gear members and operating connections from the planetgearing to the exhibitor.

13. In a device of the character described, the combination with a powermember, a shiftable marker and an exhibitor, of connections between thepower member and exhibitor comprising a driving element, a seconddriving element frictionally engaged with the first driving element andshiftable radially with relation thereto, connections between the markerand the shiftable driving element. whereby they are shiftable in unison,a differential means comprising a gear member connected to be driven bythe first driving element, a second gear member connected to be drivenby the second driving element at the same or greater speed than thefirst gear member and in the same direction of rotation, and planetgearing beeen the gear members to be rotated thereby proportionate tothe relative motion of said gear members and operating connections fromthe planet gearing to the exhibitor, substantially as described.

14c. In a device of the character described, the combination with apower member, an impression-receiving surface, connections whereby thelatter is rotated from the power member, a shiftable marker co-actingwith the impression-receiving surface and an exhibitor, of connectionsbetween the power member and exhibitor comprising a driving element, asecond driving element frictionally engaged with the first drivingelement and shiftable radially with relation thereto, connectionsbetween the marker and the shiftable driving element whereby they areshiftable in unison, a differential means comprising a gear memberconnected to be driven by the first driving element, a second gearmember journaled concentric therewith and connected to be driven by thesecond driving element at the same or greater speed than the first gearmember and in the same direction of rotation, and planet gearing betweenthe gear members arranged to be rotated by the relative movement of thegear members, a driven gear member engaged by the planet gearing andconnections from the latter member to the exhibitor, substantially asdescribed.

15. The combination with a power member of an impression receivingsurface operatively connected thereto, an exhibiting element, adifferential gear of three members, one member of which is directlydriven by the power member and the other members indirectly driventhereby, a friction drive having two members, one of which is driven bythe power member and the other of which is movable along the facethereof and is geared through all the members of the differential to theexhibiting element, an impression device, and means for simultaneouslymoving one of the friction members with respect to the other, and thesaid impression device along said impression receiving surface.

In witness whereof I have hereunto set my hand at the borough ofManhattan, city and State of New York, this 17th day of June,

FRANK E. PENDLETON. In presence of JOHN J. RANAGAN, ISABEL R. RICHARDS.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. 0.

